Radioactive Dating Method

Radioactive Dating Method - Radioactive Dating Method...

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Radioactive Dating Method Radioactive isotopes will decay in a regular exponential way such that one-half of a given amount of parent material will decay to form daughter material in a time period called a half-life . A half-life is NOT one-half the age of the rock! When the material is liquid or gaseous, the parent and daughter isotopes can escape, but when the material solidifies, they cannot so the ratio of parent to daughter isotopes is frozen in. The parent isotope can only decay, increasing the amount of daughter isotopes. Radioactive dating gives the solidification age. There are two simple steps for radioactive dating: 1. Find out how many times you need to multiply (1/2) by itself to get the observed fraction of remaining parent material. Let the number of the times be n. For example 1/8 = (1/2) × (1/2) × (1/2), so n = 3. The number n is the number of half-lives the sample has been decaying. If some material has been decaying long enough so that only 1/4 of the radioactive material is left, the sample is 2 half-lives old: 1/4 = (1/2) × (1/2),
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Radioactive Dating Method - Radioactive Dating Method...

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